Answer: Indoors, on the main incoming water line. Install the valve upstream from where the water system branches off to other appliances and downstream from water meters and pressure regulators. Do not install outdoors! Install the WaterCop valve so that the home or business owner can readily access the face of the WaterCop actuator. That way the system can easily be reset if tripped by a moisture sensor. Also the water can be shut off if repairs need to be made to a water heater, etc. The business or home owner should periodcally cycle the valve to open and close to prevent any water deposit build-up. This ensures proper operation. Also make sure the valve does not interfere with water flow to fire suppression and irrigation systems.

WaterCop actuators can respond to an almost unlimited number of moisture sensors. Do remember that a signal repeater may be necessary for sensors located far from the unit. The maximum transmission range is up tp 200 feet,clear line of sight. Actual effective working range is less than that. The WaterCop is a whole house or zoned water shut off full port ball valve with actuator that responds to radio signals from moisture sensors (waterhounds) or freeze alert sensors (FreezeHounds. Water shuts off almost instantly when sensor/s are activated and an alarm sounds at that sensor/s. AC powered or battery powered sensors have 1 or 2 moistures probes. Install sensors under water dispensing refrigerators, dishwashers, etc.

Thanks again for your question. Please contact us if you need more information.

Q:"After the explosion in San Bruno, CA on 9/9/2010, I am concerned about my home exploding. I have a natural gas furnace, a natural gas fireplace, a natural gas water heater and a natural gas range. I don't have a full basement: my crawl space is about 12 inches high. Drainage is excellent. There would be some moisture but not water. Can this automatic gas valve and sensor system system be installed there?I see that the Scentry III has a connection for an auto-dialer and also can be connected to a ventilation system. Thanks. Thomas."

Answer: This unit allows you to use remote gas detectors to place near your other gas appliances. There is a battery back-up available if you want protection during a power failure. We do have an installation manual available on our website for this unit.The Scentry Installation Manual.

The GFRAB stands for gas sensor, mounting feet, remote ready, alarm and battery and includes the gas valve shut-off/controller. NOTE: Must be used with a Scentry III gas valve (sold separately). Each Scentry gas sensor is calibrated in a gaseous atmosphere so it will alarm at 10% of the lower explosive level (LEL) of the combustible gas. This is not a carbon monoxide alarm as it has only a combustible gas alarm sensor.

So the main differences between the units are that the Scentry III-GFRAB gas alarm and gas valve controller (shut-off) includes the 24 volt transformer, has mounting feet and can add options of battery back-up, remote gas sensors and remote alarms. With the battery option, the pilot lights remain litt during intermittent power failures in regions such as the mountain states where electric power is not always continuous. A 12V output allows adding a phone dialer to alert owners of vacation homes, etc. when an unsafe condition has occurred. Remote gas sensors can be added near gas ranges, gas water heaters, gas furnaces, gas heaters, etc. to add protection using only one gas valve controller.

Please contact us if you have questions about what components to install.

Remember that you need carbon monoxide sensor alarms on every floor of your home and in every bedroom where you close the door. The CO monitor does not monitor propane or natural gas leaks: it monitors the carbon monoxide levels from incomplete combustion of fossil fuels like wood, coal, gas, charcoal, etc.